CN108770136A - A kind of light modulation toning LED isolation constant-current driving power supplies - Google Patents
A kind of light modulation toning LED isolation constant-current driving power supplies Download PDFInfo
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- CN108770136A CN108770136A CN201810939679.9A CN201810939679A CN108770136A CN 108770136 A CN108770136 A CN 108770136A CN 201810939679 A CN201810939679 A CN 201810939679A CN 108770136 A CN108770136 A CN 108770136A
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses a kind of light modulation toning LED, and constant-current driving power supply is isolated.The power supply includes：Protect circuit, EMI filter circuit, rectification circuit, regulator circuit, optical coupling isolation circuit, control module, LED light source, LED colour temperature adjusts circuis and LED luminance adjust circuit, electric main is successively through overprotection circuit, after EMI filter circuit and rectification circuit, busbar high direct voltage is provided, control module sends out the independent pwm control signal of two-way, the light modulation pin of the LED constant current control chip with dimming function in the LED isolated drive circuits of tunable optical is directly controlled all the way, carry out LED light source load light modulation, another way is converted into the pwm control signal of two complete reverse phases by the simple peripheral cell such as optocoupler, by the quick opening and closing of control output switching tube MOS, to adjust just white and two kinds of colour temperatures of warm white lamp bead output current ratio.Constant-current driving power supply is isolated in light modulation toning LED provided by the invention, has load compatibility strong, the advantage that lamp bead light decay is slow and low energy consumption.
Description
Technical field
The present invention relates to LED brightness-adjusting lighting devices fields, more particularly to a kind of light modulation toning LED isolation constant current driving electricity
Source.
Background technology
Current generation, consumer have been not content with i.e. bright simple illumination of turning on light, meanwhile, based on semiconductor technology
LED light brings unlimited development space to intelligentized control method.On this basis, light modulation toning LED light is come into being.
Light modulation：Brightness is adjustable from 3%-100%, and common scene as looked after 3% moonlight of children at night, when seeing TV
With 30% warm white, when dinner and party, uses 100% warm white.
Toning：It is adjusted between colour temperature is white in warm white and just, can just promote the attention of people in vain, be suitable for reading learning；It is warm
It allows people to feel to loosen in vain, is suitble to the scene of amusement and recreation.Certainly due to the variation of color, it is just being also suitable for hot weather in vain,
And warm white allows people more to have warmness in winter.
" brightness " can be with freely regulated LED lamp with " colour temperature " as from the foregoing, will be suitable for the various fields of family, office
Scape.This kind of lamps and lanterns will replace common LED lamp to become, the choosing of the main force of house decoration, be LED illumination industry developing direction it
One.
Currently, the difference of light modulation toning lamps and lanterns in the prior art and common LED lamps and lanterns is mainly following two points：
1. dimming toning lamp has just white and two kinds of colour temperatures of warm white lamp bead, also there is double-colored lamp bead；
2. light modulation toning lamps and lanterns use light modulation toning power supply：Light modulation toning power supply is output two-way electric current, is lighted all the way warm
White lamp bead, another way light just white lamp bead.By adjusting the size and ratio of two-way electric current, different brightness and difference may be implemented
Colour temperature.
The light modulation toning isolated power supply of development & production currently on the market, mainly uses LED constant current constant voltage source, in secondary
Increase by two output switching tube MOS frameworks.By the quick opening and closing of control output switching tube MOS.In light modulation toning
The early stage of development, this traditional and ripe framework have been introduced into the LED driving industries based on " constant-current source ", have become first generation intelligence
The power supply that can be illuminated.But this LED constant current constant voltage source, there are following disadvantages：
First, when two switch MOS of output do not have fully on, main power source enters constant voltage mode.In output two
When switch MOS is connected, it is just in constant current mode.That is just white and two kinds of colour temperatures of warm white lamp bead output is being adjusted
When current ratio (in dimming process), LED lamp bead is all to be operated in pressure constant state, easily cause in this way lamp bead light decay compared with
Soon, the problems such as easily being flickered after aging.
Secondly, poor compatibility is exported, due to the presence of constant pressure point, the conducting voltage deviation in view of lamp bead is needed to confirm,
Highest conducting voltage of the power supply after minimum conducting voltage and long-term ageing can work normally, so just can be to avoid long-term big
There is quality abnormal in batch use.
Again, the pwm control signal module for providing two output switching tube MOS drivings, is located at the secondary of power supply, to make
It is high at the stand-by power consumption of power supply, it cannot be satisfied Energy Star standard.
Invention content
The object of the present invention is to provide a kind of light modulation toning LED, and constant-current driving power supply is isolated, and has load compatibility strong, lamp
The advantage that pearly-lustre declines slowly and low energy consumption.
To achieve the above object, the present invention provides following schemes：
A kind of light modulation toning LED isolation constant-current driving power supplies, the power supply include：Protect circuit, EMI filter circuit, whole
Current circuit, regulator circuit, optical coupling isolation circuit, control module, LED light source feeder ear, LED colour temperature adjusts circuis and LED luminance
Circuit is adjusted, the output end of the protection circuit is connected with the input terminal of the EMI filter circuit, the EMI filter circuit
Output end be connected with the input terminal of the rectification circuit, electric main successively by the protection circuit, EMI filter circuit
After rectification circuit, adjusts circuit for the regulator circuit and LED luminance and busbar high direct voltage is provided；
The LED light source feeder ear includes warm white light source feeder ear and positive white light source feeder ear；
The regulator circuit is connected with the output end of the rectification circuit, and the regulator circuit is defeated to the rectification circuit
The voltage gone out is depressured, and the stabilization of maintenance voltage signal；
The control module generates control LED luminance all the way and adjusts the pwm control signal of circuit and control LED colour temperatures all the way
The pwm control signal for adjusting circuit, is denoted as brightness pwm control signal and colour temperature pwm control signal respectively；
The input terminal that the LED luminance adjusts circuit is connected with the output end of the rectification circuit, the LED luminance tune
The light modulation pin of LED constant current control chip in economize on electricity road receives the brightness pwm control signal of the control module output,
The cathode output end that the LED luminance adjusts circuit is connected with the anode of the LED light source feeder ear, the LED luminance tune
The cathode output end ground connection on economize on electricity road；
The input terminal of the optical coupling isolation circuit receives the colour temperature pwm control signal, light in the optical coupling isolation circuit
The poles C of coupling are connected with the LED colour temperature adjusts circuis, and the LED colour temperature adjusts circuis include being connected with the poles C of optocoupler
Switching tube, the switching tube are connected with the cathode of the cathode of the warm white light source feeder ear and the positive white light source feeder ear
It connects, the optical coupling isolation circuit controls leading for switching tube in the LED colour temperature adjusts circuis according to the colour temperature pwm control signal
Logical or cut-off, to control the output current ratio of the warm white light source and the positive white light source.
Optionally, the LED colour temperature adjusts circuis include the first output switching tube, the second output switching tube and triode,
The optical coupling isolation circuit includes an optocoupler, is denoted as the first optocoupler, and the poles C of first optocoupler pass through the first output switching tube
It is connected with the cathode of the warm white light source feeder ear, the poles C of first optocoupler pass through institute also after the paraphase of triode
The second output switching tube is stated with the cathode of the positive white light source feeder ear to be connected.
Optionally, the LED colour temperature adjusts circuis include third output switching tube and the 4th output switching tube, the colour temperature
Pwm control signal includes the first colour temperature pwm control signal and the second colour temperature pwm control signal, the optical coupling isolation circuit include
The input terminal of two optocouplers, respectively the second optocoupler and third optocoupler, second optocoupler receives the first colour temperature PWM controls
Signal, the input terminal of the third optocoupler receive the second colour temperature pwm control signal, and the poles C of second optocoupler pass through the
Three output switching tubes are connected with the cathode of the warm white light source feeder ear, and the poles C of the third optocoupler are opened by the 4th output
The cathode of positive white light source feeder ear described in Guan Guanyu is connected.
Optionally, the protection circuit includes：Current foldback circuit and surge protection circuit.
Optionally, the poles C of first optocoupler are connected with the poles G of the first output switching tube, the first output switch
The poles D of pipe are connected with the cathode of the warm white light source feeder ear；The poles C of first optocoupler pass through current-limiting resistance and described three
The poles B of pole pipe are connected, and the poles C of the triode are connected with the poles G of the second output switching tube, the second output switching tube
The poles D be connected with the cathode feeder ear of the positive white light source feeder ear, it is described first output switching tube the poles S, described second
The poles S, the poles E of the first optocoupler and the poles E of the triode of output switching tube are all connected with power supply secondary ground.
Optionally, the poles C of second optocoupler are connected with the poles G of third output switching tube, the third output switch
The poles D of pipe are connected with the cathode of the warm white light source feeder ear, the G of the poles C of the third optocoupler and the 4th output switching tube
Pole is connected, and the poles D of the 4th output switching tube are connected with the cathode of the positive white light source feeder ear, the third output
The poles S of switching tube, the 4th output poles S of switching tube, the E of the poles E of second optocoupler and the third optocoupler are extremely equal
Connect power supply secondary ground.
Optionally, the LED colour temperature adjusts circuis further include the first pressure limited protection circuit and the second pressure limited protection circuit, institute
It states first pressure limited protection circuit one end with the poles S of the first output switching tube or third output switching tube to be connected, institute
The other end for stating the first pressure limited protection circuit is extremely connected with the G of the first output switching tube or third output switching tube
It connects, the poles the G phase of one end of second pressure limited protection circuit and the second output switching tube or the 4th output switching tube
Connection, the S that the other end of second pressure limited protection circuit exports switching tube or the 4th output switching tube with described second
Pole is connected.
Optionally, first pressure limited protection circuit is constituted by zener diode D2 is in parallel with resistance R6；Second limit
Voltage protection circuit is constituted by zener diode D3 is in parallel with resistance R7.
Optionally, the poles C of first optocoupler also adjust the cathode output end of circuit by resistance R4 and the LED luminance
It is connected, the poles C of the triode are also connected by resistance R5 with the cathode output end of LED luminance adjusting circuit.
Optionally, the poles C of second optocoupler also adjust the cathode output end of circuit by resistance R9 and the LED luminance
It is connected, the poles C of the third optocoupler are also connected by resistance R10 with the cathode output end of LED luminance adjusting circuit.
According to specific embodiment provided by the invention, the invention discloses following technique effects：Light modulation provided by the invention
Constant-current driving power supply is isolated in the LED that mixes colours, and control module sends out mutually independent pwm control signal, respectively brightness PWM control letters
Number and colour temperature pwm control signal, brightness pwm control signal, which directly controls, has light modulation in the LED isolated drive circuits of tunable optical
The light modulation pin of the LED constant current control chip of function, carries out LED light source load light modulation, colour temperature pwm control signal is by optocoupler etc.
Simple peripheral cell is just white and two kinds of colour temperatures of warm white to adjust by the quick opening and closing of control output switching tube MOS
Lamp bead output current ratio, to achieve the purpose that toning, and this is bright in the process LED isolation drives constant-current supply of this color-temperature regulating
The output total current of degree state is constant, this makes LED light source load lamp pearly-lustre decline slowly, and driving power load compatibility is strong.In addition,
The primary in driving power is arranged in the control module for generating pwm control signal, this makes driving power power consumption very low, meets energy saving
Requirement.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that constant-current driving power supply electrical block diagram is isolated in first embodiment of the invention light modulation toning LED；
Fig. 2 is that constant-current driving power supply electrical block diagram is isolated in second embodiment of the invention light modulation toning LED.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of light modulation toning LED, and constant-current driving power supply is isolated, and has load compatibility strong, lamp
The advantage that pearly-lustre declines slowly and low energy consumption.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
As shown in Figure 1 and Figure 2, light modulation toning LED isolation constant-current driving power supplies provided by the invention include：Protection circuit 1,
EMI filter circuit 2, rectification circuit 3, regulator circuit 4, optical coupling isolation circuit 7, control module 6, LED light source feeder ear, LED colors
Temperature adjusts circuit 8 and LED luminance adjusts circuit 5, the input terminal of the output end and the EMI filter circuit 2 of the protection circuit 1
It is connected, the output end of the EMI filter circuit 2 is connected with the input terminal of the rectification circuit 3, and exchange city's L, N electricity is successively
After the protection circuit 1, EMI filter circuit 2 and rectification circuit 3, to give non-isolated constant pressure accessory power supply power supply voltage stabilizing electricity
Road 4 and LED luminance adjust circuit 5 and provide busbar high direct voltage；LED luminance adjust circuit 5 in using isolating transformer realize with
The isolation at LED load end, protection circuit are overcurrent, surge protection circuit.
Non-isolated constant pressure accessory power supply power supply regulator circuit 4, the general control chip with constant pressure output characteristics.Only need
Busbar high direct voltage after rectification is reduced to low-voltage direct by few peripheral assembly, steady using three-terminal regulator chip
It presses to the subsequent control module power supply for generating pwm control signal.Regulator circuit 4 is connected with the output end of the rectification circuit 3
It connects, the voltage that the regulator circuit 4 exports the rectification circuit 3 is depressured, and the stabilization of maintenance voltage signal.
The control module 6 of pwm control signal is generated, it is general that there is the MCU modules for exporting two or more pwm signals.?
In the present invention, the control module of pwm control signal is generated, a brightness is exported and controls pwm signal, circuit is adjusted to LED luminance.
In addition it also exports a colour temperature and controls pwm signal, to two switching tube MOS tonings of secondary LED colour temperature adjusts circuis, remember respectively
For brightness pwm control signal and colour temperature pwm control signal.By adjusting the duty ratio of brightness pwm control signal, control LED is negative
The brightness of load controls the variation of LED load colour temperature by adjusting the duty ratio of colour temperature pwm control signal.Control module 6 can be with
For WIFI module, bluetooth module, infrared receiver and emit the journeys such as IR modules, pyroelectric human body red line sensor, microwave module
Formula controls the module of output pwm signal.
The LED light source feeder ear includes warm white light source feeder ear and positive white light source feeder ear；
The input terminal that the LED luminance adjusts circuit 5 is connected with the output end of the rectification circuit 3, the LED luminance
The light modulation pin for adjusting the control chip of the LED constant current in circuit 5 receives the brightness PWM controls of the output of the control module 6
Signal, the cathode output end that the LED luminance adjusts circuit 5 are connected with the anode of the LED light source feeder ear, the LED
The cathode output end of brightness regulating circuit 5 is grounded, the LED luminance pwm control signal duty exported by adjusting control module 6
Than that can directly control LED light source and carry out load light modulation, to realize the purpose for adjusting brightness.
Embodiment one
As shown in Figure 1, the input terminal of optical coupling isolation circuit 7 receives the colour temperature pwm control signal, optical coupling isolation circuit 7
Including an optocoupler, it is denoted as the first optocoupler, colour temperature pwm control signal is transferred to by current-limiting resistance R4, the first optocoupler U1 isolation
The secondary (being extremely connected with the G of R5, switching tube Q1) of the LED isolated drive circuits of tunable optical, the poles C and the LED of the first optocoupler
Colour temperature adjusts circui 8 is connected, and LED colour temperature adjusts circuis 8 include the first output switching tube Q1, the second output switching tube Q3 and three
The poles C of pole pipe Q2, the first optocoupler are connected by the first output switching tube Q1 with the cathode of warm white light source feeder ear, the first optocoupler
The poles C also after the paraphase of triode Q2, by second output switching tube Q3 be connected with the cathode of positive white light source feeder ear.
The poles C of first optocoupler are connected with the poles G of the first output switching tube, the poles D of the first output switching tube Q1 and warm white
The cathode feeder ear of light source is connected；The poles C of first optocoupler are also connected by current-limiting resistance R5 with the poles B of triode Q2, and three
The poles C of pole pipe Q2 are connected with the poles G of the second output switching tube Q3, the second poles D of output switching tube Q3 and bearing for positive white light source
Pole feeder ear is connected；LED colour temperature adjusts circuis 7 further include the first pressure limited protection circuit and the second pressure limited protection circuit, and first
Pressure limited protection circuit one end is connected with the poles S of the first output switching tube Q1, the other end of the first pressure limited protection circuit with it is described
The poles G of first output switching tube Q1 are connected, and one end of the second pressure limited protection circuit is extremely connected with the G of the second output switching tube Q3
It connects, the other end of the second pressure limited protection circuit is connected with the poles S of the second output switching tube Q3；First pressure limited protection circuit is by steady
Press diode D2 is in parallel with resistance R6 to constitute；Second pressure limited protection circuit is constituted by zener diode D3 is in parallel with resistance R7；The
The poles S of one output switching tube Q1 and the poles S of the second output switching tube Q3 are all connected with power supply secondary ground；The poles C of first optocoupler are also logical
It crosses resistance R2 with the anode of the LED light source feeder ear to be connected, the poles C of triode Q2 also pass through resistance R3 and the LED light
The cathode output end of source feeder ear is connected.
Since colour temperature pwm control signal is after the paraphase of triode Q2, the conducting of control output switching tube Q3 is closed,
So output switching tube Q1 is that reverse phase is connected, closes with switching tube Q3 is exported.That is output switching tube Q1 conductings, output switching tube Q3
It closes, vice versa.
First output switching tube Q1, which is opened, to be connected by R4, R6 and the positive of LED light source feeder ear, and D2 plays voltage-limiting protections
Effect.Second output switching tube Q3, which is opened, to be connected by R5, R7 and the positive of LED light source feeder ear, and D3 plays voltage-limiting protections and makees
With.
When generating the second control pwm signal high level of the control module output of pwm control signal, by optocoupler U1
It is transferred to U1C extremely low levels, that is, the extremely low level of Q1G, Q1 cut-offs.The pole R8, Q2B for connecting the poles U1C is also low level, Q2
Cut-off.Second output switching tube Q3 is opened divides LED+ terminal voltages to be connected by R5, R7.
When second control pwm signal of the control module output of generation pwm control signal is low level, by optocoupler U1
It is transferred to U1C extremely high level, that is, the high level of Q1G, output switching tube Q1 is opened divides LED+ terminal voltages to lead by R4, R6
It is logical.The pole R8, Q2B for connecting the poles U1C is also high level, Q2 conductings.The extremely low level of namely Q3G, Q3 cut-offs.
Since in this way, the second primary control pwm signal of control driving power can be controlled after light-coupled isolation is transmitted
System two metal-oxide-semiconductors of output being opened and closing, to realize the purpose for adjusting colour temperature.
Power supply output connection LED light source load circuit, LED light source load by just white and two kinds of colour temperatures of warm white lamp bead (
By double-colored lamp bead) it forms, the anode of the LED lamp bead of anode two kinds of colour temperatures of connection of LED light source feeder ear, the cathode of warm white light source
The cathode feeder ear of feeder ear and positive white light source is separately connected the cathode of the LED lamp bead of two kinds of colour temperatures.
Embodiment two
As shown in Fig. 2, LED colour temperature adjusts circuis include the third output switching tube Q5 of output switching tube Q4 and the 4th, colour temperature
Pwm control signal includes the first colour temperature pwm control signal and the second colour temperature pwm control signal, and optical coupling isolation circuit includes two
The input terminal of optocoupler, respectively the second optocoupler U2 and third optocoupler U3, the second optocoupler receives the first colour temperature pwm control signal, the
The input terminal of three optocouplers receives the second colour temperature pwm control signal, and the poles C of the second optocoupler export switching tube and warm white by third
The cathode of source feeder ear is connected, and the poles C of third optocoupler pass through the 4th cathode phase for exporting switching tube and positive white light source feeder ear
Connection.
The poles G that the poles C of second optocoupler export switching tube with third are connected, and third exports the poles D and the warm white of switching tube
The cathode of source feeder ear is connected, and the poles C of third optocoupler are connected with the poles G of the 4th output switching tube, the 4th output switching tube
The poles D be connected with the cathode of positive white light source feeder ear, third exports the poles S of switching tube, the poles S of the 4th output switching tube, the
The poles E of two optocouplers and the poles E of third optocoupler are all connected with power supply secondary ground.The poles C of second optocoupler also by resistance R9 with it is described
The cathode output end that LED luminance adjusts circuit is connected, and the poles C of the third optocoupler also pass through resistance R10 and the LED luminance
The cathode output end for adjusting circuit is connected.
LED colour temperature adjusts circuis further include the first pressure limited protection circuit and the second pressure limited protection circuit, the first voltage-limiting protection
The poles S that circuit on one side exports switching tube with third are connected, and the other end and the third of the first pressure limited protection circuit export switching tube
The poles G be connected, one end of the second pressure limited protection circuit with the 4th output switching tube the poles G be connected, the second voltage-limiting protection electricity
The other end on road is connected with the poles S of the 4th output switching tube.First pressure limited protection circuit is by zener diode D2 and resistance R6
Parallel connection is constituted；Second pressure limited protection circuit is constituted by zener diode D3 is in parallel with resistance R7.
The program by the first colour temperature pwm control signal and the second colour temperature pwm control signal respectively to warm white light source and just
The current ratio of white light source is adjusted, to achieve the purpose that toning.
Light modulation toning LED isolation constant current driving constant-current power provided by the invention has the advantage that：
The LED isolation drive constant-current supplies 1. the light modulation of the present invention is mixed colours, it is defeated by the control module for generating pwm control signal
The brightness pwm control signal gone out directly controls the tune that LED luminance adjusts the LED constant current control chip with dimming function in circuit
Light pin carries out LED light source load light modulation.
Colour temperature pwm control signal by generating the control module output of pwm control signal passes through the letters such as optocoupler, triode
Single peripheral cell is converted into the pwm control signal of two complete reverse phases, the quick unlatching by control output switching tube MOS and pass
It closes, to adjust just white and two kinds of colour temperatures of warm white lamp bead output current ratio, to achieve the purpose that toning.And in this color-temperature regulating
The current luminance state of process LED isolation drive constant-current supplies output total current it is constant.
Above-mentioned analysis is it is found that constant current driving constant-current power is isolated in the light modulation toning LED of the present invention, in the process of any light modulation
In, constant current state is always worked in, does not have the presence of " pressure constant state ", the design of such circuit, to the compatibility of LED light source load
Property it is strong, lamp bead light decay is slow, overcome tradition light modulation toning constant pressure and flow LED drive power the shortcomings that.
2. because generating the control module design of pwm control signal in the primary of driving power, such as non-isolated constant pressure auxiliary
The control chip that power circuit is exported using the constant pressure of six grades of energy consumptions, the stand-by power consumption of driving power are easily met Energy Star
It is required that.
3. other opposite light modulation toning LED drive power schemes, circuit is simple, and reliability is high and at low cost.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. constant-current driving power supply is isolated in a kind of light modulation toning LED, which is characterized in that the power supply includes：Protect circuit, EMI filters
Wave circuit, rectification circuit, regulator circuit, optical coupling isolation circuit, control module, LED light source feeder ear, LED colour temperature adjusts circuis
Circuit is adjusted with LED luminance, the output end of the protection circuit is connected with the input terminal of the EMI filter circuit, the EMI
The output end of filter circuit is connected with the input terminal of the rectification circuit, and electric main is successively by the protection circuit, EMI
After filter circuit and rectification circuit, adjusts circuit for the regulator circuit and LED luminance and busbar high direct voltage is provided；
The LED light source feeder ear includes warm white light source feeder ear and positive white light source feeder ear；
The regulator circuit is connected with the output end of the rectification circuit, and the regulator circuit exports the rectification circuit
Voltage is depressured, and the stabilization of maintenance voltage signal；
The control module generates control LED luminance all the way and adjusts the pwm control signal of circuit and control LED color temperature adjustments all the way
The pwm control signal of circuit is denoted as brightness pwm control signal and colour temperature pwm control signal respectively；
The input terminal that the LED luminance adjusts circuit is connected with the output end of the rectification circuit, and the LED luminance adjusts electricity
The light modulation pin of LED constant current control chip in road receives the brightness pwm control signal of the control module output, described
The cathode output end that LED luminance adjusts circuit is connected with the anode of the LED light source feeder ear, and the LED luminance adjusts electricity
The cathode output end on road is grounded；
The input terminal of the optical coupling isolation circuit receives the colour temperature pwm control signal, the C of optocoupler in the optical coupling isolation circuit
Pole is connected with the LED colour temperature adjusts circuis, and the LED colour temperature adjusts circuis include the switch being connected with the poles C of optocoupler
Pipe, the switching tube are connected with the cathode of the cathode of the warm white light source feeder ear and the positive white light source feeder ear, institute
State optical coupling isolation circuit according to the colour temperature pwm control signal control in the LED colour temperature adjusts circuis conducting of switching tube or
Cut-off, to control the output current ratio of the warm white light source and the positive white light source.
2. constant-current driving power supply is isolated in light modulation toning LED according to claim 1, which is characterized in that the LED colour temperatures tune
Economize on electricity road includes the first output switching tube, the second output switching tube and triode, and the optical coupling isolation circuit includes an optocoupler,
It is denoted as the first optocoupler, the poles C of first optocoupler pass through the first cathode phase for exporting switching tube and the warm white light source feeder ear
Connection, the poles C of first optocoupler export switching tube and the positive white light also after the paraphase of triode, by described second
The cathode of source feeder ear is connected.
3. constant-current driving power supply is isolated in light modulation toning LED according to claim 1, which is characterized in that the LED colour temperatures tune
Economize on electricity road includes third output switching tube and the 4th output switching tube, and the colour temperature pwm control signal includes the first colour temperature PWM controls
Signal processed and the second colour temperature pwm control signal, the optical coupling isolation circuit include two optocouplers, respectively the second optocoupler and third
The input terminal of optocoupler, second optocoupler receives the first colour temperature pwm control signal, and the input terminal of the third optocoupler receives
The poles C of the second colour temperature pwm control signal, second optocoupler export switching tube and the warm white light source power supply by third
The cathode at end is connected, and the poles C of the third optocoupler pass through the 4th cathode for exporting switching tube and the positive white light source feeder ear
It is connected.
4. constant-current driving power supply is isolated in light modulation toning LED according to claim 1, which is characterized in that the protection circuit
Including：Current foldback circuit and surge protection circuit.
5. constant-current driving power supply is isolated in light modulation toning LED according to claim 2, which is characterized in that first optocoupler
The poles C be connected with the poles G of the first output switching tube, the poles D and the warm white light source feeder ear of the first output switching tube
Cathode be connected；The poles C of first optocoupler are connected by current-limiting resistance with the poles B of the triode, the triode
The poles C be connected with the poles G of the second output switching tube, the poles D and the positive white light source feeder ear of the second output switching tube
Cathode feeder ear be connected, the poles S of the first output switching tube, second output poles S of switching tube, the first optocoupler
The poles E and the poles E of the triode are all connected with power supply secondary ground.
6. constant-current driving power supply is isolated in light modulation toning LED according to claim 3, which is characterized in that second optocoupler
The poles C and third export the poles G of switching tube and be connected, the poles D of the third output switching tube and the warm white light source feeder ear
Cathode be connected, the poles C of the third optocoupler with the 4th output switching tube the poles G be connected, it is described 4th output switching tube
The poles D be connected with the cathode of the positive white light source feeder ear, the poles S of third output switching tube, the 4th output are opened
The poles S, the poles E of second optocoupler and the poles E of the third optocoupler for closing pipe are all connected with power supply secondary ground.
7. constant-current driving power supply is isolated in light modulation toning LED according to claim 2 or 3, which is characterized in that the LED colors
It further includes the first pressure limited protection circuit and the second pressure limited protection circuit that temperature, which adjusts circuit, first pressure limited protection circuit one end with
It is described first output switching tube or the third output switching tube the poles S be connected, first pressure limited protection circuit it is another
The poles G for exporting switching tube with the first output switching tube or the third are held to be connected, second pressure limited protection circuit
One end is connected with the poles G of the second output switching tube or the 4th output switching tube, second pressure limited protection circuit
The other end with it is described second output switching tube or it is described 4th output switching tube the poles S be connected.
8. constant-current driving power supply is isolated in light modulation toning LED according to claim 7, which is characterized in that first pressure limiting
Protect electricity routing zener D2 is in parallel with resistance R6 to constitute；Second pressure limited protection circuit is by zener diode D3 and electricity
R7 parallel connections are hindered to constitute.
9. constant-current driving power supply is isolated in light modulation toning LED according to claim 2, which is characterized in that first optocoupler
The poles C also adjust the cathode output end of circuit by resistance R4 and the LED luminance and be connected, the poles C of the triode are also logical
Resistance R5 is crossed with the cathode output end of LED luminance adjusting circuit to be connected.
10. constant-current driving power supply is isolated in light modulation toning LED according to claim 3, which is characterized in that second optocoupler
The poles C also adjust the cathode output end of circuit by resistance R9 and the LED luminance and be connected, the poles C of the third optocoupler are also
The cathode output end for adjusting circuit with the LED luminance by resistance R10 is connected.
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| CN111787660A (en) * | 2020-08-01 | 2020-10-16 | 中山市承智照明科技有限公司 | Intelligent light and color adjusting control system circuit structure |
| CN111787660B (en) * | 2020-08-01 | 2024-06-11 | 中山市承智照明科技有限公司 | Intelligent dimming and toning control system circuit structure |
| CN111970794A (en) * | 2020-08-10 | 2020-11-20 | 昱雯(上海)国际贸易有限公司 | Induction control method, device and system based on power grid |
| CN112770438A (en) * | 2020-12-25 | 2021-05-07 | 佛山市中昊光电科技有限公司 | Color temperature adjustable COB light source |
| CN112881763A (en) * | 2020-12-29 | 2021-06-01 | 南京长亚轨道交通科技有限公司 | Alternating current constant current load circuit |
| CN112996175A (en) * | 2021-05-12 | 2021-06-18 | 深圳市全智芯科技有限公司 | Control circuit and control method for adjusting lighting parameters |
| CN112996175B (en) * | 2021-05-12 | 2021-08-24 | 深圳市全智芯科技有限公司 | Control circuit and control method for adjusting lighting parameters |
| CN114071829A (en) * | 2021-12-23 | 2022-02-18 | 慕光(广东)智能照明科技有限公司 | LED power supply controller control circuit of intelligence degree of depth adjusting luminance mixing of colors |
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